<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>iframe的使用</title>
</head>
<body>
<h1>使用iframe嵌套网页</h1>
<p><a href="homework03.html" target="mainFrame">第一张网页</a><br /><br />
  <a href="homework02.html" target="mainFrame">第二张网页</a><br /><br />
  <a href="homework01.html" target="mainFrame">第三张网页</a><br />
</p>
<iframe name="mainFrame" width="1000px" height="700px"  src="homework03.html" />
</body>
</html>
